Exhibit 10.3

AMENDMENT NO. 3 TO MINERAL LEASE

THIS AMENDMENT No. 3 to MINERAL
LEASE (Amendment No. 3) is made effective the 1st day of July, 2011 (Effective Date) and entered into as of the Effective Date by and between the TETLIN VILLAGE COUNCIL, a/k/a TETLIN TRIBAL
COUNCIL (Tetlin), an Alaska Native Village corporation organized pursuant to the Alaska Native Claims Settlement Act, 43 U.S.C. §§1601  1629 (ANCSA), whose address is P.O. Box 797
Tok, AK 99789, and CONTANGO ORE, INC., a Delaware corporation, as successor-in-interest by assignment of JUNEAU EXPLORATION, LP, d/b/a JUNEAU MINING COMPANY (Juneau), and authorized to do business in Alaska and having its
principal place of business at 3700 Buffalo Speedway, Suite 960, Houston, TX 77098 (CORE).

RECITALS

WHEREAS, Tetlin and COREs predecessor, Juneau, entered into a Mineral Lease effective July 15, 2008 (the Original
Lease), for which a Memorandum of Mineral Lease was recorded on September 19, 2008 in the records of the Fairbanks Recording District: 401, State of Alaska, as document number 2008-019032-0;

WHEREAS, the Original Lease was amended by (i) Amendment No. 1 to Mineral Lease effective October 1, 2009, for which a
Memorandum of Amendment No. 1 to Mineral Lease was recorded on December 29, 2009 in the records of Fairbanks Recording District, 401, State of Alaska, as document number 2609-025744-0, and (ii) Amendment No. 2 to Mineral Lease
effective June 1, 2011 (the Original Lease, Amendment No. 1 and Amendment No. 2, collectively the Mineral Lease);

WHEREAS, Tetlin and CORE desire to amend the Mineral Lease as set forth herein;

NOW THEREFORE, in consideration of the covenants contained herein, the parties agree as follows:

1. On or about the date hereof, CORE has paid Tetlin $150,000 in consideration of reducing the Production Royalty in Section 3.3 by
an amount equal to 0.50% and Section 3.3(a), (b), (c) and (d) are hereby deleted and the following substituted therefor:

(a) For gold, silver, platinum, palladium, rhodium, ruthenium, osmium, iridium or any other precious metals or gems the amount of the Production Royalty shall be:

2.25% for the first four years of full scale production from the Subject Lands;



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3.25% for the fifth, sixth and seventh years of full scale production from the Subject
Lands; and

4.25% for the eighth and following years of full scale production from the Subject Lands;

(b) For all lead, zinc, tungsten or other metallic, non-precious Minerals produced from the Subject Lands, the amount of the Production
Royalty shall be 1.25%;

(c) For uranium or coal produced from the Subject Lands, the amount of the Production Royalty shall be
11.75%; and

(d) For oil, natural gas and related hydrocarbons produced from the Subject Lands, the amount of the Production
Royalty shall be 15.9167%.

provided, however, Tetlin shall have the option to be exercised on or before July 15,
2020 by written notice to CORE to increase the percentage Production Royalty specified in (a), (b), (c) and (d) above, as amended, by (i) .25% by payment to CORE of $150,000 in cash, or (ii) .50% by payment to CORE of $300,000 in
cash, or (iii) .75% by payment to CORE of $450,000 in cash.

2. At the request of CORE, Tetlin shall execute a Memorandum
of Amendment No. 3 to Mineral Lease that shall not disclose consideration or other financial information contained herein. CORE shall be entitled to record the Memorandum in the official records of the Fairbanks Recording District, State of
Alaska. The execution, recording and filing of the Memorandum shall not limit, increase or in any manner affect any of the terms hereof, or any rights, interest or obligations of parties hereto.

3. The remaining terms and provisions of the Mineral Lease shall remain unchanged and of full force and effect, and except as modified
herein, the terms and provisions of the Mineral Lease shall apply to this Amendment No. 3.

(Signature Page Follows)



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TETLIN VILLAGE COUNCIL



|       |  |                  |  |  |  |        |  |                
|------ |  | ---------------- |  |  |  | ------ |  | ---------------
|By:    |  | /s/ DONALD ADAMS |  |  |  | By:    |  | /s/ MICHAEL SAM
|Name:  |  | Donald Adams     |  |  |  | Name:  |  | Michael Sam    
|Title: |  | President        |  |  |  | Title: |  | Vice President 

ATTEST:



|       |  |                    |  |  |  |        |  |                
|------ |  | ------------------ |  |  |  | ------ |  | ---------------
|By:    |  | /s/ ROY DAVID, SR. |  |  |  | By:    |  | /s/ WANDA DAVID
|Name:  |  | Roy David, Sr.     |  |  |  | Name:  |  | Wanda David    
|Title: |  | Sec./Tres.         |  |  |  | Title: |  | Member         



|       |  |                |  |  |  |        |  |                  
|------ |  | -------------- |  |  |  | ------ |  | -----------------
|By:    |  | /s/ DIANE JOHN |  |  |  | By:    |  | /s/ WILFRED ADAMS
|Name:  |  | Diane John     |  |  |  | Name:  |  | Wilfred Adams    
|Title: |  | Member         |  |  |  | Title: |  | Member           

CONTANGO ORE, INC.

ATTEST:



|       |  |                      |  |  |  |        |  |                    
|------ |  | -------------------- |  |  |  | ------ |  | -------------------
|By:    |  | /s/ DAVID L. ROGHEIR |  |  |  | By:    |  | /s/ KENNETH R. PEAK
|Name:  |  | David L. Rogheir     |  |  |  | Name:  |  | Kenneth R. Peak    
|Title: |  | Magistrate           |  |  |  | Title: |  | Chairman and CEO   



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